Calibration of single-ended high-speed interfaces

Patent metadata

Field	Value
Publication number	US-9525571-B2
Application number	US-201414196993-A
Country	US
Kind code	B2
Filing date	Mar 4, 2014
Priority date	Mar 5, 2013
Publication date	Dec 20, 2016
Grant date	Dec 20, 2016

Abstract

A method for calibrating signal swing and a trip reference voltage. The signal swing of a system can be calibrated in a symmetric or asymmetric technique through adjustment of a drive parameter such as a supply voltage for a transmitter or a drive termination. The trip reference voltage of the system can also be calibrated in a symmetric or asymmetric technique through sampling of a data pattern to determine an ideal level of the trip reference voltage.

First claim

What is claimed is:

1. A method of calibrating a trip reference voltage, the method comprising:
receiving, at a receiving device, a data pattern from a transmitting device via a connection;
comparing, at the receiving device, the data pattern with the trip reference voltage to generate samples of the data pattern;
monitoring, at the receiving device, the samples for data transitions in the data pattern;
determining at the receiving device, a difference between a first time c…

Assignees

• Lattice Semiconductor Corp

Inventors

• Ruberg Alan T
• Gondi Srikanth

Classifications

• H04L25/03885

  Electricity · mapped topic

• H04L25/028

  Electricity · mapped topic

• H04L25/0288 Primary

  Electricity · mapped topic